But these beliefs about peptide hormones(肽激素)were questioned as laboratory after laboratory found that antiserums(抗血清)to peptide hormones, when injected into the brain, bind in places other than the hypothalamus(下丘脑), indicating that either the hormones or substances that cross-react with the antiserums are present.

译文：

但是这些对于肽激素的信仿，被一个又一个的实验室质疑，他们发现抗血清被注入大脑后，并不在下丘脑那里才凝固，显示出肽激素和与抗血清反作用的物质都不存在。

Dance like nobody's watching. Shake, twist, and jump around. Let yourself feel the joy of moving to your favorite music.

译文：

尽情的跳舞吧，就像没人看见一样。摇过来扭过去，上蹿下跳。听着你喜欢的音乐，尽情的享受这摇摆的欢乐吧。

College students were a major force in the campaign, although participants of all ages were involved. Still, we cannot really credit a handful of individuals for the success of Earth Day. After all, a major message of Earth Day is that every single person has an important role in the environment.

译文：

尽管不同年龄的参与者都参与其中，大学生是这些运动的主力军。但是我们确实不能只把地球日的成功归功于一小部分人。毕竟，地球日意味着每一个人在环境保护中都起着重要的作用。

The Internet allows schools to develop a large amount of learning material that is accessible for students online anytime. There are so many choices of courses and subjects or time frames that completing a program is not an issue for students anymore. We found that online education gives us excellent sources of information, saves our time, money and it is extremely convenient.

译文：

有了因特网，学校能够开发出大量的学习材料以供学生随时从网上获取。在网上，学生对各种课程和时间段有多种选择。因此，完成一项教育计划对学生而言就不再成为问题了。我们发现，在线教育为我们提供了绝好的信息资源，节约了时间和金钱，而且十分方便。

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